9 foot Instant Tennis Net System is an expandable 9 foot net system that is a great tennis training aid that can be set up in less than 3 minutes. The 9 foot Instant Tennis Net System includes two 23 Racquets, two ultra low compression tennis balls, chalk for line marking and a games/drills booklet. The sand or water filled bases allow you to expand your court size or add additional nets. The 9 foot Instant Tennis Net System can be set up anywhere you have room to play and stores in a very small place. The set has exceptional durability, is wind/UV resistant and features a patent pending bounce back feature, which makes the game even more fun to play.